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(inside quadrangle, vertex 1 should be largest)
(computes direction for polygon cw or ccw and swaps indices if required)
(ok for non-pathological 4 sided polygons including convex)
(info: iquad: internal quadrilateral, four x,y points, cw/ccw dir, radius comp)
o<iquad> sub
#<toolno> = #1 (=1)
#<rpm> = #2 (=1)
#<dir> = #3 (=2 2conv|3climb)
#<feedrate> = #4 (=10)
#<cutdepth> = #5 (=.1)
#<zincr> = #6 (=.02)
#<zsafe> = #7 (=0.2)
#<zstart> = #8 (=0)
#<x1> = #9
#<y1> = #10
#<x2> = #11
#<y2> = #12
#<x3> = #13
#<y3> = #14
#<x4> = #15
#<y4> = #16
#<scale> = #17 (=1)
#<rotate> = #18 (=0)
#<xoff> = #19 (=0)
#<yoff> = #20 (=0)
#<spin_notify> = #21 (=0)
#<use_g43> = #22 (=1)
#<h_for_g43> = #23 (=0)
#<verbose> = #24 (=0)
o<i0> if [#<scale> EQ 0]
#<scale> = 1.0
(debug, scale was 0, setting #<scale>)
o<i0> endif
o<loadtool> call [#<toolno>][#<use_g43>][#<h_for_g43>][#<verbose>]
#<tooldiam> = [#5410 + .001]
o<l00> if [[#<dir> NE 2] AND [#<dir> NE 3]]
(debug, iquad: bad direction #<dir> - EXITING)
(print, iquad: bad direction #<dir> - EXITING)
(AXIS,notify, iquad: bad direction - EXITING)
m2
o<l00> endif
(compute direction eg cw,ccw for points as specified:)
o<dir> call [4][#<x1>][#<y1>][#<x2>][#<y2>][#<x3>][#<y3>][#<x4>][#<y4>]
#<pointsdir> = #<_dir:>
o<l20> if [#<pointsdir> NE #<dir>]
(print swap for pointsdir=#<pointsdir> user:#<dir>)
(swap 1234 --> 1432)
#<xt> = #<x2>
#<yt> = #<y2>
#<x2> = #<x4>
#<y2> = #<y4>
#<x4> = #<xt>
#<y4> = #<yt>
o<l20> endif
(apply scale, rotate, then offset to all input points)
o<move> call [#<x1>][#<y1>][#<rotate>][#<scale>][#<xoff>][#<yoff>]
#<x1> = #<_move:x>
#<y1> = #<_move:y>
o<move> call [#<x2>][#<y2>][#<rotate>][#<scale>][#<xoff>][#<yoff>]
#<x2> = #<_move:x>
#<y2> = #<_move:y>
o<move> call [#<x3>][#<y3>][#<rotate>][#<scale>][#<xoff>][#<yoff>]
#<x3> = #<_move:x>
#<y3> = #<_move:y>
o<move> call [#<x4>][#<y4>][#<rotate>][#<scale>][#<xoff>][#<yoff>]
#<x4> = #<_move:x>
#<y4> = #<_move:y>
#<r> = [#<tooldiam>/2]
#<cutdepth> = [0 - #<cutdepth>]
#<zincr> = [0 - #<zincr>]
(get lengths and angles for connecting lines)
o<line> call [#<x1>][#<y1>][#<x2>][#<y2>]
#<cos12> = #<_line:cos>
#<sin12> = #<_line:sin>
o<line> call [#<x2>][#<y2>][#<x3>][#<y3>]
#<cos23> = #<_line:cos>
#<sin23> = #<_line:sin>
(compute angles at line interesctions:)
o<dot> call [#<x4>][#<y4>][#<x1>][#<y1>][#<x2>][#<y2>]
#<ang412> = #<_dot:ang>
o<dot> call [#<x1>][#<y1>][#<x2>][#<y2>][#<x3>][#<y3>]
#<ang123> = #<_dot:ang>
g40 (cutter radius compensation off)
f #<feedrate>
s #<rpm> m3 (spindle cw)
o<if1> if [#<spin_notify> GT 0]
o<spin> call [#<rpm>]
o<if1> endif
g0 z#<zsafe>
#<zcurrent> = #<zstart>
#<pass> = 1
o<wh010> while [#<zcurrent> GT #<cutdepth>]
#<zcurrent> = [#<zcurrent> + #<zincr>]
o<wh020> if [#<zcurrent> LT #<cutdepth>]
#<zcurrent> = #<cutdepth>
o<wh020> endif
o<wh030> if [#<pass> GT 100]
(debug, iquad: too many passes - EXITING)
(print, iquad: too many passes - EXITING)
(AXIS,notify, iquad: too many passes - EXITING)
m2
o<wh030> endif
o<pas00> if [#<pass> EQ 1]
(entry point:)
(for acute angle: go along the 1-->2 line to enter)
(at a point where tool will fit)
#<elen12> = [ #<r> / [TAN[#<ang412>/2]]]
#<k12> = [#<elen12> / #<r>]
(print entry 12 k=#<k12> elen12=#<elen12> angle=#<angle>)
#<ax> = [#<x1> + #<elen12> * #<cos12>]
#<ay> = [#<y1> + #<elen12> * #<sin12>]
(compute pre-entry points:)
o<dir00> if [#<dir> EQ 2]
#<bx> = [#<ax> + #<r> * #<sin12> - #<r> * #<cos12>]
#<by> = [#<ay> - #<r> * #<cos12> - #<r> * #<sin12>]
#<cx> = [#<bx> + #<r> * #<cos12>]
#<cy> = [#<by> + #<r> * #<sin12>]
#<vx> = [ #<r> * #<cos12>]
#<vy> = [ #<r> * #<sin12>]
o<dir00> else (dir EQ 3 CCW)
#<bx> = [#<ax> - #<r> * #<sin12> - #<r> * #<cos12>]
#<by> = [#<ay> + #<r> * #<cos12> - #<r> * #<sin12>]
#<cx> = [#<bx> + #<r> * #<cos12>]
#<cy> = [#<by> + #<r> * #<sin12>]
#<vx> = [ #<r> * #<cos12>]
#<vy> = [ #<r> * #<sin12>]
o<dir00> endif
g0 x #<cx> y #<cy> (preentry 1)
g0 x #<bx> y #<by> (preentry 2)
o<dir10> if [#<dir> EQ 2]
/ g42 (cutter radius comp right of path)
g2 x #<ax> y #<ay> i #<vx> j #<vy> (arc entry)
o<dir10> else (dir EQ 3 CCW)
/ g41 (cutter radius comp left of path)
g3 x #<ax> y #<ay> i #<vx> j #<vy> (arc entry)
o<dir10> endif
#<xfinal_a> = #<x2>
#<yfinal_a> = #<y2>
(rampdown finishes at point 2, to exit: need to turn corner at 2)
(and go along the 2-->3 line enough to exit)
#<elen23> = [ #<r> / [TAN[#<ang123>/2]]]
#<k23> = [#<elen23> / #<r>]
(print exit 23 k=#<k23> elen23=#<elen23> angle=#<ang123>)
(need a test here: if you go along 23 too far you gouge vertex 3)
#<xfinal_b> = [#<x2> + #<elen23> * #<cos23>]
#<yfinal_b> = [#<y2> + #<elen23> * #<sin23>]
g1 z #<zstart> (plunge to start height todo:g0)
o<pas00> endif
x #<x2> y #<y2> z#<zcurrent> (ramp down to zcurrent)
x #<x3> y #<y3>
x #<x4> y #<y4>
x #<x1> y #<y1>
#<pass> = [#<pass> + 1]
o<wh010> endwhile
(print a= #<xfinal_a> #<yfinal_a> k=#<k23>)
(print b= #<xfinal_b> #<yfinal_b>)
g1 x #<xfinal_a> y #<yfinal_a>
g1 x #<xfinal_b> y #<yfinal_b>
g0 z #<zsafe>
g40
o<iquad> endsub
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